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Marquise|Lab Grown|IGI

1.21ct D VS1 Marquise Lab Grown Diamond

VG • D/VS1 • IGI LG809688217

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG809688217

Diamond specifications and retailer prices

From £142 GBP
As of November 2, 2026
Save £724 GBP (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,317 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.21ct lab-grown marquise diamond

This 1.21ct lab-grown marquise sits in the classic one-carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG809688217 or 809688217. Listed at 16 retailers as of November 1, 2026, with a 509% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
D
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG809688217
Dimensions11.72 × 5.59 × 3.17 mm
L/W Ratio2.10
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.72 mm5.59 mm1.21 ctD / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG809688217
Side View
Table 60.0%Crown 32.2°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 56.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £1,317 GBP|Low: £159 GBP|High: £1,317 GBP|Avg: £473 GBP
Queensmith
Retailer 2
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Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
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Retailer 16
November 3, 2026
Retailer 4£159 GBP
Retailer 13£177 GBP
Retailer 10£236 GBP
Retailer 3£239 GBP
Retailer 5£302 GBP
Retailer 11£304 GBP
Retailer 2£319 GBP
Retailer 6£342 GBP
Retailer 16£359 GBP
Retailer 9£430 GBP
Retailer 14£568 GBP
Retailer 15£570 GBP
Retailer 8£607 GBP
Retailer 12£826 GBP
Retailer 7£866 GBP
Queensmith£1,317 GBP

8 data points across 16 retailers

16 retailers£142 GBP to £866 GBP

A
Cheapest Retailer
-
£142 GBP
A
Retailer 2
-
£159 GBP
View
Final sale: no returns
A
Retailer 3
-
£177 GBP
View
A
Retailer 4
-
£236 GBP
View
B+
Retailer 5
-
£239 GBP
View
A
Retailer 6
-
£304 GBP
View
A
Retailer 7
-
£319 GBP
View
A
Retailer 8
-
£342 GBP
View
B+
Retailer 9
-
£359 GBP
View
B+
Retailer 10
-
£430 GBP
View
B+
Retailer 11
-
£568 GBP
View
B+
Retailer 12
-
£570 GBP
View
B
Retailer 13
-
£607 GBP
View
B
Retailer 14
-
£826 GBP
View
B
Retailer 15
-
£866 GBP
View
Most Expensive
Queensmith
LG809688217 · Oct 28
£1,317 GBP
View
Price last confirmed 7 days ago
15 more retailers have this diamond
Prices start from £142 GBPSave up to £724 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.21ct Marquise
£142 GBP